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(No Model.)

G. N. CLEMSON.

SAW. No. 336,697. Patented Feb. 23, 1886.

WITNES Si INVENTOR: @2' i I (4 ZZMK @(Z v BY I! m) ATTORNEYS.

UNITED STATES PATENT OFFICEO GEORGE N. CLEMSON, OF MIDDLETOWVN, NEW YORK.

SAW,

8PECIPICATION forming part of Letters Patent No. 336,697. dated February 23, 1886.

Application filed October .27, 1885. Serial No. 181,060. (No m dal.)

To all whom it may concern:

Be it known that I, GEORGE N. CLEMSON, of Middletown, in the county of Orange and State of New York, have invented certain.

having teeth with hardened points on opposite edges thereof and having a soft center or body. My'improved saw is made of a strip ol'steel upon opposite edges of which'are out suitable teeth, a, for sawing metal. The saw-blade thus formed I heat to a suit-able ten'lperature for hardening, and then simultaneously harden the points of the teeth upon both edges of the saw, leaving the body b of the saw soft.

By hardening the points of the teeth a in the manner described and leaving the bases of the teeth soft I am enabled to produce a saw in which the teeth are not liable to bebroken out or stripped from the edge of the saw-blade, and by leaving the body of the saw soft the saw is rendered very flexible and strong.

By hardening the teeth upon both edges of the saw the distortion of the steel due to hardening and tempering is avoided. I make the cutting-edges c d of the saw paralleLI-o each saw having a soft untempered body with teeth soft and untempered at their bases and hardened at their extreme points, as herein specified.

GEORGE N. CLEMSON. Witnesses:

GEO. M. HOPKINS,

O. SEDGWICK.

other, to save material in manufacture and to As an improved article of manufacture, a 

